728578568522 has 24 divisors (see below), whose sum is σ = 1280999823840. Its totient is φ = 309864380280.

The previous prime is 728578568513. The next prime is 728578568527. The reversal of 728578568522 is 225865875827.

It is not an unprimeable number, because it can be changed into a prime (728578568527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28363022 + ... + 28388697.

It is an arithmetic number, because the mean of its divisors is an integer number (53374992660).

Almost surely, 2^728578568522 is an apocalyptic number.

728578568522 is a deficient number, since it is larger than the sum of its proper divisors (552421255318).

728578568522 is a wasteful number, since it uses less digits than its factorization.

728578568522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56751866 (or 56751859 counting only the distinct ones).

The product of its digits is 150528000, while the sum is 65.

The spelling of 728578568522 in words is "seven hundred twenty-eight billion, five hundred seventy-eight million, five hundred sixty-eight thousand, five hundred twenty-two".